device for lifting and lowering a seat for professionalisation.

摘要

A mechanism for raising and lowering a seat, especially designed for handicapped persons, comprises two supporting arms (A', B') which are both at one of their ends coupled to the seat (E), at the front and rear edge thereof, respectively. At their other end, the supporting arms (A', B') cooperate with a fixed point (1', 2') each. At least one of the supporting arms is coupled to a driving member and the two supporting arms (A', B') are interconnected at a point between their ends. With a view to obtaining a space-saving but all the same stable mechanism allowing a physiologically correct trajectory of the seat during its raising and lowering, the supporting arms (A', B') are directly pivotally interconnected (D), and one of the supporting arms cooperates with the fixed point in such a manner that it is displaceable in relation to said point.